com_android_server_fingerprint_FingerprintService.cpp revision ebbf205bc6e8292f74d8fc4652c70274a445f907 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "Fingerprint-JNI"
18
19#include "JNIHelp.h"
20#include <inttypes.h>
21
22#include <android_runtime/AndroidRuntime.h>
23#include <android_runtime/Log.h>
24#include <android_os_MessageQueue.h>
25#include <hardware/hardware.h>
26#include <hardware/fingerprint.h>
27#include <utils/Log.h>
28#include <utils/Looper.h>
29#include "core_jni_helpers.h"
30
31namespace android {
32
33static const uint16_t kVersion = HARDWARE_MODULE_API_VERSION(2, 0);
34
35static const char* FINGERPRINT_SERVICE = "com/android/server/fingerprint/FingerprintService";
36static struct {
37    jclass clazz;
38    jmethodID notify;
39} gFingerprintServiceClassInfo;
40
41static struct {
42    fingerprint_module_t const* module;
43    fingerprint_device_t *device;
44} gContext;
45
46static sp<Looper> gLooper;
47static jobject gCallback;
48
49class CallbackHandler : public MessageHandler {
50    int type;
51    int arg1, arg2, arg3;
52public:
53    CallbackHandler(int type, int arg1, int arg2, int arg3)
54        : type(type), arg1(arg1), arg2(arg2), arg3(arg3) { }
55
56    virtual void handleMessage(const Message& message) {
57        //ALOG(LOG_VERBOSE, LOG_TAG, "hal_notify(msg=%d, arg1=%d, arg2=%d)\n", msg.type, arg1, arg2);
58        JNIEnv* env = AndroidRuntime::getJNIEnv();
59        env->CallVoidMethod(gCallback, gFingerprintServiceClassInfo.notify, type, arg1, arg2, arg3);
60    }
61};
62
63// Called by the HAL to notify us of fingerprint events
64static void hal_notify_callback(fingerprint_msg_t msg) {
65    uint32_t arg1 = 0;
66    uint32_t arg2 = 0;
67    uint32_t arg3 = 0;
68    switch (msg.type) {
69        case FINGERPRINT_ERROR:
70            arg1 = msg.data.error;
71            break;
72        case FINGERPRINT_ACQUIRED:
73            arg1 = msg.data.acquired.acquired_info;
74            break;
75        case FINGERPRINT_PROCESSED:
76            arg1 = msg.data.processed.finger.fid;
77            arg2 = msg.data.processed.finger.gid;
78            break;
79        case FINGERPRINT_TEMPLATE_ENROLLING:
80            arg1 = msg.data.enroll.finger.fid;
81            arg2 = msg.data.enroll.finger.gid;
82            arg3 = msg.data.enroll.samples_remaining;
83            break;
84        case FINGERPRINT_TEMPLATE_REMOVED:
85            arg1 = msg.data.removed.finger.fid;
86            arg2 = msg.data.removed.finger.gid;
87            break;
88        default:
89            ALOGE("fingerprint: invalid msg: %d", msg.type);
90            return;
91    }
92    // This call potentially comes in on a thread not owned by us. Hand it off to our
93    // looper so it runs on our thread when calling back to FingerprintService.
94    // CallbackHandler object is reference-counted, so no cleanup necessary.
95    gLooper->sendMessage(new CallbackHandler(msg.type, arg1, arg2, arg3), Message());
96}
97
98static void nativeInit(JNIEnv *env, jobject clazz, jobject mQueue, jobject callbackObj) {
99    ALOG(LOG_VERBOSE, LOG_TAG, "nativeInit()\n");
100    gCallback = MakeGlobalRefOrDie(env, callbackObj);
101    gLooper = android_os_MessageQueue_getMessageQueue(env, mQueue)->getLooper();
102}
103
104static jint nativeEnroll(JNIEnv* env, jobject clazz, jint timeout, jint groupId) {
105    ALOG(LOG_VERBOSE, LOG_TAG, "nativeEnroll(gid=%d, timeout=%d)\n", groupId, timeout);
106    int ret = gContext.device->enroll(gContext.device, groupId, timeout);
107    return reinterpret_cast<jint>(ret);
108}
109
110static jint nativeAuthenticate(JNIEnv* env, jobject clazz, jlong sessionId, jint groupId) {
111    ALOG(LOG_VERBOSE, LOG_TAG, "nativeAuthenticate(sid=%" PRId64 ", gid=%d)\n", sessionId, groupId);
112    int ret = gContext.device->authenticate(gContext.device, sessionId, groupId);
113    return reinterpret_cast<jint>(ret);
114}
115
116static jint nativeEnrollCancel(JNIEnv* env, jobject clazz) {
117    ALOG(LOG_VERBOSE, LOG_TAG, "nativeEnrollCancel()\n");
118    int ret = gContext.device->enroll_cancel(gContext.device);
119    return reinterpret_cast<jint>(ret);
120}
121
122static jint nativeRemove(JNIEnv* env, jobject clazz, jint fingerId, jint groupId) {
123    ALOG(LOG_VERBOSE, LOG_TAG, "nativeRemove(fid=%d, gid=%d)\n", fingerId, groupId);
124    fingerprint_finger_id_t finger;
125    finger.fid = fingerId;
126    finger.gid = groupId;
127    int ret = gContext.device->remove(gContext.device, finger);
128    return reinterpret_cast<jint>(ret);
129}
130
131static jint nativeOpenHal(JNIEnv* env, jobject clazz) {
132    ALOG(LOG_VERBOSE, LOG_TAG, "nativeOpenHal()\n");
133    int err;
134    const hw_module_t *hw_module = NULL;
135    if (0 != (err = hw_get_module(FINGERPRINT_HARDWARE_MODULE_ID, &hw_module))) {
136        ALOGE("Can't open fingerprint HW Module, error: %d", err);
137        return 0;
138    }
139    if (NULL == hw_module) {
140        ALOGE("No valid fingerprint module");
141        return 0;
142    }
143
144    gContext.module = reinterpret_cast<const fingerprint_module_t*>(hw_module);
145
146    if (gContext.module->common.methods->open == NULL) {
147        ALOGE("No valid open method");
148        return 0;
149    }
150
151    hw_device_t *device = NULL;
152
153    if (0 != (err = gContext.module->common.methods->open(hw_module, NULL, &device))) {
154        ALOGE("Can't open fingerprint methods, error: %d", err);
155        return 0;
156    }
157
158    if (kVersion != device->version) {
159        ALOGE("Wrong fp version. Expected %d, got %d", kVersion, device->version);
160        // return 0; // FIXME
161    }
162
163    gContext.device = reinterpret_cast<fingerprint_device_t*>(device);
164    err = gContext.device->set_notify(gContext.device, hal_notify_callback);
165    if (err < 0) {
166        ALOGE("Failed in call to set_notify(), err=%d", err);
167        return 0;
168    }
169
170    // Sanity check - remove
171    if (gContext.device->notify != hal_notify_callback) {
172        ALOGE("NOTIFY not set properly: %p != %p", gContext.device->notify, hal_notify_callback);
173    }
174
175    ALOG(LOG_VERBOSE, LOG_TAG, "fingerprint HAL successfully initialized");
176    return reinterpret_cast<jlong>(gContext.device);
177}
178
179static jint nativeCloseHal(JNIEnv* env, jobject clazz) {
180    return -ENOSYS; // TODO
181}
182
183// ----------------------------------------------------------------------------
184
185// TODO: clean up void methods
186static const JNINativeMethod g_methods[] = {
187    { "nativeAuthenticate", "(JI)I", (void*)nativeAuthenticate },
188    { "nativeEnroll", "(II)I", (void*)nativeEnroll },
189    { "nativeEnrollCancel", "()I", (void*)nativeEnrollCancel },
190    { "nativeRemove", "(II)I", (void*)nativeRemove },
191    { "nativeOpenHal", "()I", (void*)nativeOpenHal },
192    { "nativeCloseHal", "()I", (void*)nativeCloseHal },
193    { "nativeInit","(Landroid/os/MessageQueue;"
194            "Lcom/android/server/fingerprint/FingerprintService;)V", (void*)nativeInit }
195};
196
197int register_android_server_fingerprint_FingerprintService(JNIEnv* env) {
198    jclass clazz = FindClassOrDie(env, FINGERPRINT_SERVICE);
199    gFingerprintServiceClassInfo.clazz = MakeGlobalRefOrDie(env, clazz);
200    gFingerprintServiceClassInfo.notify =
201            GetMethodIDOrDie(env, gFingerprintServiceClassInfo.clazz,"notify", "(IIII)V");
202    int result = RegisterMethodsOrDie(env, FINGERPRINT_SERVICE, g_methods, NELEM(g_methods));
203    ALOG(LOG_VERBOSE, LOG_TAG, "FingerprintManager JNI ready.\n");
204    return result;
205}
206
207} // namespace android
208